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|
#!/usr/bin/ruby
#------------------------------------------------------------------------------
#
# get_wiki_data.rb [DIR]
#
#------------------------------------------------------------------------------
#
# Reads all the wiki pages from 'tagpages.list' and gets their content from
# the OSM wiki. The pages are parsed and the information stored in the
# sqlite database 'taginfo-wiki.db' which must have been initialized before.
#
# All files are in DIR or the current directory if no directory was given on
# the command line.
#
# This script writes copious debugging information to STDOUT. You might want
# to redirect that to a file.
#
#------------------------------------------------------------------------------
#
# Copyright (C) 2013 Jochen Topf <jochen@remote.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#------------------------------------------------------------------------------
require 'json'
require 'net/http'
require 'uri'
require 'sqlite3'
require './lib/mediawikiapi.rb'
#------------------------------------------------------------------------------
class WikiPage
@@pages = {}
attr_accessor :content
attr_reader :type, :timestamp, :namespace, :title, :description, :image, :tag, :key, :value, :lang, :ttype, :tags_implies, :tags_combination, :tags_linked, :parsed, :has_templ, :group, :onNode, :onWay, :onArea, :onRelation
def self.pages
@@pages.values.sort{ |a,b| a.title <=> b.title }
end
def self.find(name)
@@pages[name]
end
def initialize(type, timestamp, namespace, title)
@type = type # 'page' or 'redirect'
@timestamp = timestamp # page last touched
@namespace = namespace # 'XX' (mediawiki namespace or '')
@title = title # wiki page title
@has_templ = false
@parsed = nil
@tags_linked = []
@group = ''
@@pages[@title] = self
end
# Has this wiki page a name that we can understand and process?
def check_title
return :wrong_lang_format if @lang !~ /^[a-z]{2}(-[a-z0-9-]+)?$/
return :lang_en if @title =~ /^en:/i
return :value_for_key if @ttype == 'key' && ! @value.nil?
return :no_value_for_tag if @ttype == 'tag' && @value.nil?
return :slash_in_key if @key =~ %r{/}
return :slash_in_value if @value =~ %r{/}
return :ok
end
# Return parameters for API call to read this page.
def params
{ :title => title, :action => 'raw' }
end
def add_tag_link(tag)
@tags_linked << tag
end
# Parse content of the wiki page. This will find the templates
# and their parameters.
def parse_content(db)
@parsed = true
text = @content.gsub(%r{<!--.*?-->}, '')
# dummy template as base context
context = [ Template.new ]
loop do
# split text into ('before', 'token', 'after')
m = /^(.*?)(\{\{|\}\}|[|=])(.*)$/m.match(text)
# we are done if there are no more tokens
if m.nil?
return
end
# do the right thing depending on next token
case m[2]
when '{{' # start of template
context.last.add_parameter(m[1].strip)
context << Template.new()
when '}}' # end of template
context.last.add_parameter(m[1].strip)
c = context.pop
parse_template(c, db)
context.last.add_parameter(c)
when '|' # template parameter
context.last.add_parameter(m[1].strip)
context.last.parname(nil)
when '=' # named template parameter
parameter_name = (m[1].strip == ':') ? 'subkey' : m[1].strip
context.last.parname(parameter_name)
end
# 'after' is our next 'text'
text = m[3]
end
rescue => ex
puts "Parsing of page #{title} failed '#{ex.message}'"
@parsed = false
end
def set_image(ititle, db)
if !ititle.nil? && ititle.match(%r{^(file|image):(.*)$}i)
@image = "File:#{$2}"
else
puts "invalid image: page='#{title}' image='#{ititle}'"
db.execute('INSERT INTO invalid_image_titles (page_title, image_title) VALUES (?, ?)', title, ititle)
@image = ''
end
end
def parse_template(template, db)
puts "Template: #{template.name} [#{template.parameters.join(',')}] #{template.named_parameters.inspect}"
if template.name == 'Key' || template.name == 'Tag'
tag = template.parameters[0]
if tag
if template.parameters[1]
tag += '=' + template.parameters[1]
end
add_tag_link(tag)
end
end
if template.name =~ /(Key|Value|Relation)Description$/
@has_templ = true
if template.named_parameters['description']
desc = []
template.named_parameters['description'].each do |i|
if i.class == Template
desc << ' ' << i.parameters.join('=') << ' '
else
desc << i
end
@description = desc.join('').strip
end
end
if template.named_parameters['image']
img = template.named_parameters['image'][0]
if img.class != Template
set_image(img, db)
end
end
if template.named_parameters['group']
group = template.named_parameters['group'][0]
if group.class != Template
@group = group
end
end
if template.named_parameters['onNode'] == ['yes']
@onNode = true
end
if template.named_parameters['onWay'] == ['yes']
@onWay = true
end
if template.named_parameters['onArea'] == ['yes']
@onArea = true
end
if template.named_parameters['onRelation'] == ['yes']
@onRelation = true
end
if template.named_parameters['implies']
template.named_parameters['implies'].each do |i|
if i.class == Template
tags_implies << i.parameters.join('=')
end
end
end
if template.named_parameters['combination']
template.named_parameters['combination'].each do |i|
if i.class == Template
tags_combination << i.parameters.join('=')
end
end
end
end
end
end
#------------------------------------------------------------------------------
class KeyOrTagPage < WikiPage
def initialize(type, timestamp, namespace, title)
super(type, timestamp, namespace, title)
@tag = title.gsub(/^([^:]+:)?(Key|Tag):/, '') # complete tag (key=value)
@key = @tag.sub(/=.*/, '') # key
if @tag =~ /=/
@value = @tag.sub(/.*?=/, '') # value (if any)
end
if title =~ /^(.*):(Key|Tag):/
@lang = $1.downcase # IETF language tag
@ttype = $2.downcase # 'tag' or 'key'
else
@lang = 'en'
end
@tags_implies = []
@tags_combination = []
@onNode = false
@onWay = false
@onArea = false
@onRelation = false
end
def insert(db)
db.execute(
"INSERT INTO wikipages (lang, tag, key, value, title, body, tgroup, type, has_templ, parsed, description, image, on_node, on_way, on_area, on_relation, tags_implies, tags_combination, tags_linked) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
lang,
tag,
key,
value,
title,
content,
group,
type,
has_templ ? 1 : 0,
parsed ? 1 : 0,
description,
image,
onNode ? 1 : 0,
onWay ? 1 : 0,
onArea ? 1 : 0,
onRelation ? 1 : 0,
tags_implies. sort.uniq.join(','),
tags_combination.sort.uniq.join(','),
tags_linked. sort.uniq.join(',')
)
end
end
#------------------------------------------------------------------------------
class KeyPage < KeyOrTagPage
end
class TagPage < KeyOrTagPage
end
class RelationPage < WikiPage
attr_reader :rtype
def initialize(type, timestamp, namespace, title)
super(type, timestamp, namespace, title)
@rtype = title.gsub(/^([^:]+:)?Relation:/, '') # relation type
if title =~ /^(.*):Relation:/
@lang = $1.downcase # IETF language tag
else
@lang = 'en'
end
end
def set_image(ititle, db)
@image = "File:#{ititle}"
end
def insert(db)
db.execute(
"INSERT INTO relation_pages (lang, rtype, title, body, tgroup, type, has_templ, parsed, description, image, tags_linked) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
lang,
rtype,
title,
content,
group,
type,
has_templ ? 1 : 0,
parsed ? 1 : 0,
description,
image,
tags_linked.sort.uniq.join(',')
)
end
end
#------------------------------------------------------------------------------
class Template
attr_reader :name, :parameters, :named_parameters
def initialize()
@name = nil
@parname = nil
@parameters = []
@named_parameters = {}
end
def parname(name)
@parname = name
end
def add_parameter(value)
if value != ''
if @parname.nil? # positional parameter
# first parameter is really the name of this template
if @name.nil?
@name = value
else
@parameters << value
end
else # named parameter
@named_parameters[@parname] ||= []
@named_parameters[@parname] << value
end
end
end
end
#------------------------------------------------------------------------------
class Cache
def initialize(dir, db, api)
@db = db
@api = api
@db.execute("ATTACH DATABASE ? AS cache", dir + '/wikicache.db')
@current_pagetitles = {}
end
def get_page(page)
@current_pagetitles[page.title] = page.timestamp
@db.execute("SELECT * FROM cache.cache_pages WHERE title=? AND timestamp=?", page.title, page.timestamp) do |row|
page.content = row['body']
puts "Page #{ page.title } in cache (#{ page.timestamp })"
return
end
@db.execute("DELETE FROM cache.cache_pages WHERE title=?", page.title);
res = @api.get(page.params)
page.content = res.body
@db.execute("INSERT INTO cache.cache_pages (title, timestamp, body) VALUES (?, ?, ?)", page.title, page.timestamp, page.content);
puts "Page #{ page.title } not in cache (#{ page.timestamp })"
end
# Removes pages from cache that are not in the wiki any more
def cleanup
@db.execute("SELECT title FROM cache.cache_pages") do |row|
@current_pagetitles.delete(row['title'])
end
to_delete = @current_pagetitles.keys
puts "Deleting pages from cache: #{ to_delete.join(' ') }"
to_delete.each do |title|
@db.execute("DELETE FROM cache.cache_pages WHERE title=?", title);
end
end
end
#------------------------------------------------------------------------------
dir = ARGV[0] || '.'
db = SQLite3::Database.new(dir + '/taginfo-wiki.db')
db.results_as_hash = true
#------------------------------------------------------------------------------
api = MediaWikiAPI::API.new('wiki.openstreetmap.org', 80, '/w/index.php?')
cache = Cache.new(dir, db, api)
db.transaction do |db|
File.open(dir + '/tagpages.list') do |wikipages|
wikipages.each do |line|
line.chomp!
(type, timestamp, namespace, title) = line.split("\t")
if title =~ /(^|:)Key:/
page = KeyPage.new(type, timestamp, namespace, title)
elsif title =~ /(^|:)Tag:/
page = TagPage.new(type, timestamp, namespace, title)
elsif title =~ /(^|:)Relation:/
page = RelationPage.new(type, timestamp, namespace, title)
else
puts "Wiki page has wrong format: '#{title}'"
next
end
puts "Parsing page: title='#{page.title}' type='#{page.type}' timestamp='#{page.timestamp}' namespace='#{page.namespace}'"
reason = page.check_title
if reason == :ok
cache.get_page(page)
page.parse_content(db)
page.insert(db)
else
puts "invalid page: #{reason} #{page.title}"
db.execute('INSERT INTO invalid_page_titles (reason, title) VALUES (?, ?)', reason.to_s, page.title)
end
end
end
cache.cleanup
end
#-- THE END -------------------------------------------------------------------
|